\centering
\begin{tabular}{p{80pt}>{\centering}p{80pt}>{\raggedleft\arraybackslash}p{80pt}}
  \toprule
  \input texlet/tab-base-header
  \midrule
  \input texlet/tab-base-win
  \input texlet/tab-base-unix
  \input texlet/tab-base-mac
  \input texlet/tab-base-cross
  \bottomrule
\end{tabular}
